CN216916183U - Power-on self-locking key circuit of electric power-assisted bicycle - Google Patents
Power-on self-locking key circuit of electric power-assisted bicycle Download PDFInfo
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- CN216916183U CN216916183U CN202122760105.5U CN202122760105U CN216916183U CN 216916183 U CN216916183 U CN 216916183U CN 202122760105 U CN202122760105 U CN 202122760105U CN 216916183 U CN216916183 U CN 216916183U
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Abstract
The utility model provides a power-on self-locking key circuit of an electric power-assisted bicycle, belonging to the technical field of electric power-assisted bicycles and comprising: the device comprises a battery power supply circuit, a battery power-on self-locking circuit, a switch key circuit, a switch state detection input circuit and a switch state detection output circuit; the battery power supply circuit is electrically connected with the battery power-on self-locking circuit and the switch key circuit, the battery power-on self-locking circuit is electrically connected with the switch key circuit, and the switch key circuit is electrically connected with the switch state detection input circuit and the switch state detection output circuit; the battery power-on self-locking circuit receives a self-locking signal from the MCU, the battery power-on self-locking circuit and the battery power supply circuit form a conducting loop, and when a switch of the switch key circuit is disconnected, power is stably supplied through the battery power supply circuit. The utility model avoids the situation of accidental power-on caused by short circuit of instrument key circuits or misoperation of users, and improves the safety performance.
Description
The technical field is as follows:
the utility model belongs to the technical field of electric power-assisted bicycles, and particularly relates to a power-on self-locking key circuit of an electric power-assisted bicycle.
Background art:
the driving system of the electric power-assisted bicycle gives auxiliary power when riding or pushing, namely when the electric power-assisted bicycle is pedaled or pushed by manpower. The drive system of an electric power assisted bicycle generally includes: the system comprises components such as a meter, a controller, a battery (comprising a battery management system BMS), a sensor, a motor and the like. Wherein actuating system produces the boosting when the bicycle is ridden, and supplementary bicycle moves ahead.
The conventional electric power-assisted bicycle generally completes the power-on work of a driving system by operating a switch button of an instrument, but a safe and effective circuit is lacked to prevent the accidental power-on condition.
The utility model content is as follows:
the utility model provides a power-on self-locking key circuit of an electric power-assisted bicycle, aiming at solving the problem of accidental power-on caused by short circuit of a key circuit of an instrument or misoperation of a user and improving the safety performance.
The embodiment of the utility model provides a power-on self-locking key circuit of an electric power-assisted bicycle, which comprises: the device comprises a battery power supply circuit, a battery power-on self-locking circuit, a switch key circuit, a switch state detection input circuit and a switch state detection output circuit; the battery power supply circuit is electrically connected with the battery power-on self-locking circuit and the switch key circuit, the battery power-on self-locking circuit is electrically connected with the switch key circuit, and the switch key circuit is electrically connected with the switch state detection input circuit and the switch state detection output circuit; when the switch of the switch key circuit is closed, the switch key circuit and the battery power supply circuit form a conducting loop, and initial power supply is carried out through the battery power supply circuit; the battery power-on self-locking circuit receives a self-locking signal from the MCU, the battery power-on self-locking circuit and the battery power supply circuit form a conducting loop, and when a switch of the switch key circuit is disconnected, power is stably supplied through the battery power supply circuit.
By adopting the technical scheme, when the switch key is pressed down, the power-on self-locking key circuit is conducted, the battery supplies power to the MCU through the power-on self-locking key circuit, the MCU determines that the switch key is pressed down to be effective power-on and power-on during starting up according to voltage change in preset time, the MCU returns a self-locking signal to the power-on self-locking key circuit, the power-on self-locking key circuit locks the battery to stably supply power, and when the switch key is loosened, the battery can still stably supply power; testing whether the power-on self-locking key circuit is normal or not through fault detection after the MCU is powered on; when the power is on, when a signal generated by a key is received, the power-on self-locking key circuit outputs a voltage change, and the single chip microcomputer MCU judges the power-off signal or the boosting signal according to the voltage change.
Further, the power-on self-locking key circuit of the electric power-assisted bicycle further comprises: the switch state detection input circuit receives a switch state detection signal from the MCU, and when the switch of the switch key circuit is closed again, the switch state detection output circuit outputs a variable voltage.
By adopting the technical scheme, the detection signal of the MCU is received by the switch state detection input circuit, and the change voltage is output by the switch state detection output circuit.
Further, the switch state detection input circuit may function as a fault detection circuit.
By adopting the technical scheme, the power-on self-locking key circuit is used for detecting the normal work of the power-on self-locking key circuit.
Further, the power-on self-locking key circuit of the electric power-assisted bicycle further comprises: the power supply battery supplies power to the MCU through the power-on self-locking key circuit.
By adopting the technical scheme, the power supply battery is used for supplying power to the MCU.
Further, the single chip microcomputer MCU sends a self-locking signal to the battery power-on self-locking circuit and sends a switch state detection signal to the switch state detection input circuit.
By adopting the technical scheme, the self-locking signal can be sent to the battery power-on self-locking circuit through the single chip microcomputer MCU, and the switch state detection signal can also be sent to the switch state detection input circuit.
Further, the switch button circuit includes: the switch key, the diode D19, the diode D21 and the resistor R101; one end of the KEY PORT of the switch KEY and one end of the diode D19 are electrically connected with one end of the diode D21, the other end of the KEY PORT of the switch KEY is electrically connected with one end of the resistor R101, and the other end of the resistor R101 is grounded.
By adopting the technical scheme, when the switch KEY circuit KEY PORT is pressed by the start KEY, the switch is closed, so that the Q10 of the battery power supply circuit is conducted to generate the power supply VIN.
Further, the battery power supply circuit includes: the power supply circuit comprises a triode Q10, a resistor R80, a capacitor C59 and a resistor R85, wherein the base of the triode Q10, one end of the resistor R80 and one end of the capacitor C59 are electrically connected with one end of a resistor R85, the emitter of the triode Q10, the other end of the resistor R80 and the other end of the capacitor C59 are electrically connected with a 48V power supply voltage, the collector of the triode Q10 outputs a power supply VIN, and the other end of the resistor R85 is electrically connected with the other end of a diode D19; the battery power-on self-locking circuit comprises: a triode Q11, a resistor R92 and a resistor 97; the collector of triode Q11 is connected with the link of resistance R85 and diode D19 electricity, the base of triode Q11, the one end of resistance R92 are connected with the one end of resistance R97 electricity, the other end of resistance R97 and the projecting pole of triode Q11 all ground connection, the other end of resistance R92 and singlechip MCU's port electricity is connected.
By adopting the technical scheme, when the KEY of the switch KEY circuit is pressed down, the switch at the KEY PORT is closed, the Q10 is conducted to generate the power supply VIN, the power supply VIN can generate the voltage required by the MCU through the direct current converter and the voltage regulator tube to enable the MCU to normally work, the MCU receives the self-locking signal from the MCU, the triode Q11 of the battery power-on self-locking circuit is conducted, and when the switch (KEY PORT) of the switch KEY circuit is disconnected, the triode Q10 in the battery power supply circuit is still conducted to lock the battery power supply circuit and stabilize the power supply VIN.
Further, the switch state detection input circuit includes: a triode Q14, a resistor R119 and a resistor R123; the base electrode of the triode Q14 and one end of the resistor R119 are electrically connected with one end of the resistor R123, the other end of the resistor R119 is electrically connected with a port of the MCU, the emitting electrode of the triode Q14 and the other end of the resistor R123 are both grounded, and the collector electrode of the triode Q14 is electrically connected with the KEY BTN of the switch KEY.
By adopting the technical scheme, the fault detection signal is from the MCU, specifically the MCU can output a positive pulse (fault detection signal) with a pulse width of 1ms every 1s, when the MCU outputs the positive pulse, the triode Q14 is conducted, the voltage at the KEY _ BTN position of the switch KEY circuit is low, and when the MCU detects that the period at the KEY _ BTN position of the switch KEY circuit is 1s, the high-level pulse width is 999ms, and the low-level pulse width is 1ms, the power-on self-locking KEY circuit is normal.
Further, the switch state detection output circuit includes: a capacitor C65, a capacitor R109 and a resistor R35; one end of the capacitor C65 and one end of the capacitor R109 are electrically connected with a port of the MCU, the other end of the capacitor C65 is grounded, the other end of the capacitor R109 and one end of the resistor R35 are electrically connected with the other end of the diode D21, and the other end of the resistor R35 is connected with 5V voltage.
By adopting the technical scheme, after the MCU normally works, the power-on detection signals (voltage change) at the R109 and C65 positions of the power-on detection circuit within a certain time are detected, and when the key signal (starting action) is judged to be effective, the MCU outputs the self-locking signal to the power-on self-locking circuit.
The utility model has the beneficial effects that:
according to the utility model, after the power-on detection circuit in the power-on self-locking key circuit generates voltage change within the preset time, the battery power-on self-locking circuit and the battery power supply circuit in the power-on self-locking key circuit are conducted to complete stable power supply according to the self-locking signal from the MCU, so that the accidental power-on condition caused by short circuit of an instrument key circuit or misoperation of a user is avoided, and the safety performance is improved.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.
Description of the drawings:
the accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic diagram of a power-on self-locking key circuit and a MCU frame of an electric power-assisted bicycle in an embodiment of the utility model;
FIG. 2 is a functional structure diagram of a power-on self-locking key circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power-on self-locking key circuit according to an embodiment of the present invention.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.
Referring to fig. 1 to 3, an embodiment of the present invention provides a power-on self-locking key circuit for an electric power assisted bicycle, including: the device comprises a battery power supply circuit, a battery power-on self-locking circuit, a switch key circuit, a switch state detection input circuit and a switch state detection output circuit; the battery power supply circuit is electrically connected with the battery power-on self-locking circuit and the switch key circuit, the battery power-on self-locking circuit is electrically connected with the switch key circuit, and the switch key circuit is electrically connected with the switch state detection input circuit and the switch state detection output circuit; when the switch of the switch key circuit is closed, the switch key circuit and the battery power supply circuit form a conducting loop, and initial power supply is carried out through the battery power supply circuit; the battery power-on self-locking circuit receives a self-locking signal from the MCU, the battery power-on self-locking circuit and the battery power supply circuit form a conduction loop, when a switch of the switch key circuit is disconnected, the battery power supply circuit stably supplies power, when a switch key is pressed down, the power-on self-locking key circuit is conducted, the battery supplies power to the MCU through the power-on self-locking key circuit, the MCU determines that the switch key is pressed down to be effective power-on and power-on during starting through voltage change in preset time, the MCU returns the self-locking signal to the power-on self-locking key circuit, the power-on self-locking key circuit locks the battery to stably supply power, and when the switch key is loosened, the battery can still stably supply power; testing whether the power-on self-locking key circuit is normal or not through fault detection after the MCU is powered on; when the power is on, when a signal generated by a key is received, the power-on self-locking key circuit outputs a voltage change, and the single chip microcomputer MCU judges the power-off signal or the boosting signal according to the voltage change.
The power-on self-locking key circuit of the electric power-assisted bicycle further comprises: the switch state detection input circuit receives a switch state detection signal from the MCU, when the switch of the switch key circuit is closed again, the switch state detection output circuit outputs a change voltage, the switch state detection input circuit receives the detection signal of the MCU, and outputs the change voltage through the switch state detection output circuit, and the switch state detection input circuit can be used as a fault detection circuit and is used for detecting the normal work of the power-on self-locking key circuit.
The power-on self-locking key circuit of the electric power-assisted bicycle further comprises: the power supply battery supplies power to the MCU through the power-on self-locking key circuit, the power supply battery supplies power to the MCU, the MCU sends a self-locking signal to the power-on self-locking circuit of the battery, sends a switch state detection signal to the switch state detection input circuit, and can send the self-locking signal to the power-on self-locking circuit of the battery through the MCU and also send the switch state detection signal to the switch state detection input circuit.
The switch button circuit includes: the switch key, the diode D19, the diode D21 and the resistor R101; one end of the KEY PORT of the switch KEY and one end of the diode D19 are electrically connected with one end of the diode D21, the other end of the KEY PORT of the switch KEY is electrically connected with one end of the resistor R101, the other end of the resistor R101 is grounded, and when the KEY circuit KEY is pressed down, the switch is closed, so that the Q10 of the battery power supply circuit is switched on to generate the power supply VIN.
The battery power supply circuit includes: the power supply circuit comprises a triode Q10, a resistor R80, a capacitor C59, a resistor R85, a base of the triode Q10, one end of a resistor R80 and one end of the capacitor C59 are electrically connected with one end of a resistor R85, an emitter of the triode Q10, the other end of the resistor R80 and the other end of the capacitor C59 are electrically connected with 48V power supply voltage, a collector of a triode Q10 outputs power supply VIN, and the other end of the resistor R85 is electrically connected with the other end of a diode D19; the battery power-on self-locking circuit comprises: a triode Q11, a resistor R92 and a resistor 97; the collector of the triode Q11 is electrically connected with the connecting end of the resistor R85 and the diode D19, the base of the triode Q11 and one end of the resistor R92 are electrically connected with one end of the resistor R97, the other end of the resistor R97 is grounded with the emitter of the triode Q11, the other end of the resistor R92 is electrically connected with the PORT of the MCU, when the KEY of the switch KEY circuit is pressed down by the battery power supply circuit, the switch at the KEY PORT is closed at the moment, the Q10 is conducted to generate the power supply VIN, the power supply VIN can generate the voltage required by the MCU through the direct current converter and the voltage regulator tube to enable the MCU to normally work, receive the self-locking signal from the MCU, the triode Q11 of the battery power-on self-locking circuit is conducted, and when the switch (KEY PORT) of the switch KEY circuit is disconnected, the triode Q10 in the battery power supply circuit is still conducted to lock the battery power supply circuit, and the VIN is stably supplied.
The switch state detection input circuit includes: a triode Q14, a resistor R119 and a resistor R123; the base electrode of the triode Q14, one end of the resistor R119 and one end of the resistor R123 are electrically connected, the other end of the resistor R119 is electrically connected with a port of the MCU, the emitter electrode of the triode Q14 and the other end of the resistor R123 are both grounded, the collector electrode of the triode Q14 is electrically connected with the KEY BTN of the switch KEY, the fault detection signal is from the MCU, specifically, the MCU can output positive pulses (fault detection signals) with the pulse width of 1ms every 1s, when the MCU outputs the positive pulses, the triode Q14 is conducted, the voltage at the KEY _ BTN of the switch KEY circuit is low, and when the MCU detects that the period at the KEY BTN of the switch KEY circuit is 1s, the high-level pulse width 999ms and the low-level pulse width is 1ms, the power-on self-locking KEY circuit is normal.
The switch state detection output circuit includes: a capacitor C65, a capacitor R109 and a resistor R35; one end of a capacitor C65, one end of a capacitor R109 is electrically connected with a port of the MCU, the other end of a capacitor C65 is grounded, the other end of the capacitor R109, one end of a resistor R35 is electrically connected with the other end of a diode D21, the other end of a resistor R35 is connected with 5V voltage, after the MCU normally works, power-on detection signals (voltage change) in a certain time at the R109 and C65 of the power-on detection circuit are detected, and when the key signal (starting action) is judged to be effective, the MCU outputs a self-locking signal to the power-on self-locking circuit.
The implementation mode is specifically as follows: a switch KEY MOTION in the switch KEY circuit is connected to a port of the single chip microcomputer MCU, the single chip microcomputer MCU outputs positive pulses with the pulse width of 1ms every 1s, when the single chip microcomputer MCU outputs the positive pulses, a triode I Q14 is conducted, and the voltage at the switch KEY BTN is low; when the MCU detects that the signal at the KEY BTN is 1s in period, 999ms in high-level pulse width and 1ms in low-level pulse width, the circuit is proved to be normal; when the power is not supplied, when the switch KEY is pressed down, the grounding resistor at the switch KEY PORT is conducted, the circuit of the resistor three R35, the diode one D21 and the switch KEY is grounded, the triode three Q10 is conducted, the voltage at VIN approaches to the voltage of the battery, and VIN supplies power to the controller; after the MCU is electrified, the voltage at the KEY BTN CHECK is detected, when the MCU detects that the starting action is effective, the pin of the MCU outputs a high level to conduct the two Q11 of the triode, the power supply starting circuit finishes self-locking, and the system is stably electrified.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. A power-on self-locking key circuit of an electric power-assisted bicycle is characterized by comprising: the device comprises a battery power supply circuit, a battery power-on self-locking circuit, a switch key circuit, a switch state detection input circuit and a switch state detection output circuit;
the battery power supply circuit is electrically connected with the battery power-on self-locking circuit and the switch key circuit, the battery power-on self-locking circuit is electrically connected with the switch key circuit, and the switch key circuit is electrically connected with the switch state detection input circuit and the switch state detection output circuit;
when the switch of the switch key circuit is closed, the switch key circuit and the battery power supply circuit form a conducting loop, and initial power supply is carried out through the battery power supply circuit;
the battery power-on self-locking circuit receives a self-locking signal from the MCU, the battery power-on self-locking circuit and the battery power supply circuit form a conducting loop, and when a switch of the switch key circuit is disconnected, power is stably supplied through the battery power supply circuit.
2. A power-on self-locking key circuit for an electric power-assisted bicycle according to claim 1, further comprising:
the switch state detection input circuit receives a switch state detection signal from the MCU, and when the switch of the switch key circuit is closed again, the switch state detection output circuit outputs a variable voltage.
3. A power-on self-locking button circuit for an electric power-assisted bicycle according to claim 1, wherein the switch state detection input circuit is used as a fault detection circuit.
4. A power-on self-locking key circuit for an electric power-assisted bicycle according to claim 1, further comprising: the single chip microcomputer MCU and the power supply battery are arranged;
and the power supply battery supplies power to the MCU through the power-on self-locking key circuit.
5. A power-on self-locking key circuit of an electric power-assisted bicycle according to claim 1, wherein the single-chip microcomputer MCU transmits a self-locking signal to the power-on self-locking circuit of the battery and transmits a switch state detection signal to the switch state detection input circuit.
6. A power-on self-locking key circuit for an electric power-assisted bicycle according to claim 1, wherein the switch key circuit comprises: the switch key, the diode D19, the diode D21 and the resistor R101;
one end of the KEY PORT of the switch KEY and one end of the diode D19 are electrically connected with one end of the diode D21, the other end of the KEY PORT of the switch KEY is electrically connected with one end of the resistor R101, and the other end of the resistor R101 is grounded.
7. A power-on self-locking button circuit for an electric power-assisted bicycle according to claim 6, wherein the battery power supply circuit comprises: the transistor Q10, the resistor R80, the capacitor C59 and the resistor R85;
the base of the triode Q10, one end of the resistor R80 and one end of the capacitor C59 are electrically connected with one end of the resistor R85, the emitter of the triode Q10, the other end of the resistor R80 and the other end of the capacitor C59 are electrically connected with a 48V power supply voltage, the collector of the triode Q10 outputs a power supply VIN, and the other end of the resistor R85 is electrically connected with the other end of the diode D19.
8. A power-on self-locking key circuit of an electric power-assisted bicycle according to claim 6, wherein the battery power-on self-locking circuit comprises: a triode Q11, a resistor R92 and a resistor 97;
the collector of triode Q11 is connected with the link of resistance R85 and diode D19 electricity, the base of triode Q11, the one end of resistance R92 are connected with the one end of resistance R97 electricity, the other end of resistance R97 and the projecting pole of triode Q11 all ground connection, the other end of resistance R92 and singlechip MCU's port electricity is connected.
9. A power-on self-locking button circuit for an electric power-assisted bicycle according to claim 6, wherein the switch state detection input circuit comprises: a triode Q14, a resistor R119 and a resistor R123;
the base electrode of the triode Q14 and one end of the resistor R119 are electrically connected with one end of the resistor R123, the other end of the resistor R119 is electrically connected with a port of the MCU, the emitting electrode of the triode Q14 and the other end of the resistor R123 are both grounded, and the collector electrode of the triode Q14 is electrically connected with the KEY BTN of the switch KEY.
10. A power-on self-locking button circuit for an electric power-assisted bicycle according to claim 1, wherein the switch state detection output circuit comprises: a capacitor C65, a capacitor R109 and a resistor R35;
one end of the capacitor C65 and one end of the capacitor R109 are electrically connected with a port of the MCU, the other end of the capacitor C65 is grounded, the other end of the capacitor R109 and one end of the resistor R35 are electrically connected with the other end of the diode D21, and the other end of the resistor R35 is connected with 5V voltage.
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| CN202122760105.5U CN216916183U (en) | 2021-11-11 | 2021-11-11 | Power-on self-locking key circuit of electric power-assisted bicycle |
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| CN202122760105.5U CN216916183U (en) | 2021-11-11 | 2021-11-11 | Power-on self-locking key circuit of electric power-assisted bicycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115071868A (en) * | 2022-07-21 | 2022-09-20 | 广东高标电子科技有限公司 | Electric power-assisted vehicle and control system thereof |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115071868A (en) * | 2022-07-21 | 2022-09-20 | 广东高标电子科技有限公司 | Electric power-assisted vehicle and control system thereof |
| CN115071868B (en) * | 2022-07-21 | 2023-10-03 | 广东高标电子科技有限公司 | Electric power-assisted vehicle and control system thereof |
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